ἐπιμίσγειν
From LSJ
πάντων χρηµάτων µέτρον ἐστίν ἄνθρωπος, τῶν µέν ὄντων ὡς ἐστιν, τῶν δέ οὐκ ὄντων ὡς οὐκ ἔστιν → man is the measure of all things, of things which are, that they are, and of things which are not, that they are not (Protagoras fr.1)
Lexicon Thucydideum
commercium habere, commeare, to have commerce with, traffic, 1.13.5,
MED. idem, the same 4.118.4, 4.118.4